Plane.



'ITED STATES PATENT OFFICE.

JAMES M. BURDICK, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEYRULE & LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

Specification of Letters Patent.

To all whom it may concern Be it known that I, JAMES M. BURDTGK, acitizen of the United States, residing at New Britain, Hartford county,State of Connecticut, have invented certain new and useful Improvementsin Planes, of which the following is a full, clear, and exactdescription.

This invention relates to an improvement in the construction of planes,and is more particularly concerned with the construction of a detachablecap piece for the cutter or plane iron. In such cap pieces, 1t hashitherto been the practice to provide a detachable cap piece providedwith means for engaging with the cutter and clamping it in position uponits seat upon the plane body.

My present invention contemplates employing such a cap piece in the formof a main body portion provided with a palm rest and carrying arelatively movable clamping member adapted to be positioned to engageand clamp the cutter on its seat and to lock said cap piece againstmovement relative to the plane body.

In the drawings illustrating a preferable embodiment of the invention:Figure 1 is a longitudinal section through a standard type of planeequipped with a detachable cap constructed in accordance with thepresent invention. Fig. 2 is a top plan view of said cap removed fromthe plane body.

Referring to the drawing by numerals: 1 designates the body of a planeprovided with side walls or flanges 2 and a detachable shoe 3 at theforward end thereof, a throat 1 being formed at the forward end of theplane and in the rear of the detachable shoe portion thereof. 4designates a frog or seat for the forward end of the plane iron orcutter, and 5 an interiorly threaded boss projecting upwardly from theplane body and carrying what is commonly termed a cap screw 6 providedwith the usual headed end 6. An adjusting lever 10 has its forwardendseated over the boss 5 and is provided with an adjusting head 10. Tothe rear of said head is a second adjusting device comprising a levermember 8 pivotally mounted at its forward end in the plane body andengaged at its rear end by an adjusting nut 9. A plane iron or cutter 7is seated on the body of the plane with its forward end resting upon thefrog or Patented Dec. 24, 1912.

Serial No. 708,840.

seat 1 and its cutting edge projecting into the throat 1, theintermediate portions of the cutter resting respectively over theforward ends of the adjusting lever 10 and of the second adjusting leverS. This cutter is provided with the usual longitudinal slot throughwhich the cap screw (3 projects and through and within which theadjusting head 10 extends, and with a plurality of corrugations 7 formedin its under face which are engaged by the forward end of the adjustinglever S to effect vertical adj ustment of the cutting edge of thecutter. The lever 10, through its adjusting head 10*, effects lateral orangular adjustment of said cutting edge.

The parts so far described are merely those of a standard type of planewhich has been selected for the illustrative application of thedetachable cap embodying the invention. This cap is formed as a mainbody portion con'iprising a base portion 11 adapted to be seated overthe cutter and having side walls or flanges 12 extending longitudinallythereof and beyond the end of the base portion 11, said flanges beingwidened and joined to form the rounded hollow palm rest 13. The baseportion 11, at its rear end, is formed with a slot 11 and with spacedears 1 1 extending upwardiy from said base portion at the rear endthereof and positioned on either side of said slot. Intermediate itsends, and forward of the cars 14, the base portion 11 is provided with akey-hole slot 15. A clamping lever 16 is pivotally mounted adjacent itsrear end between the ears 14, said end extending downwardly between thecars 14: and through the slotted. portion 11 and being formed at itsextremity as a cam 18. This lever 16 ex tends forwardly to a pointadjacent the keyhole slot 15 and is provided at its forward end with anupwardly extending handle or finger piece 19 and adjacent said handle,with a locking shoulder 20 extending downwardly therefrom. This shoulderis positioned to lie in substantial alinement with the rear end of thenarrowed portion of the key-hole slot 15. The main body portion, withits cars 14, side walls 12 and rearward extension 13 forming the palmrest, may be, and preferably is, formed as an integral structure.

With the foregoing construction of the parts in mind, the applicationand operation of the cap is as follows: Assuming that the cutter 7 isseated on the plane body as shown in Fig. 1 with the cap screw 6extending up through its slotted portion 7 the detachable cap is seatedover the cutter by bringing the enlarged end of the keyhole slot 15 inits base over the head of the cap screw 6 and then moving the bodyportion upwardly to bring the narrowed portion of the slot under thehead 6 of the capscrew. When this has been done, the operator grasps thehandle 19 of the clamping lever and moves it downwardly to bring the cam18 into frictional clamping engagement with the upper face of the cutter7 (or, when a clamping plate is employed in conjunction with the cutter,with the upper face of said clamping plate). Then the cam has been thusmoved to clamping engagement with the cutter, the locking shoulder 20will have been moved over the head 6 of the cap screw and will abut andbe locked thereagainst by reason of the frictional engagement of the cam18 with the cutter 7. From this, it will be evident that the cutter isfirmly held on its seat and that vided with a cutter seat and with anupthe cap cannot be accidentally moved longitudinally of the plane bodyto break the clamping engagement of the cam 18 therewith. The frictionalclamping engagement of the cam with the cutter is such that it issufiicient to retain the cutter fixed on the seat under ordinaryconditions of service, but permits adjustment of the cutter by suitablemeans without disturbing or loosening the cap.

While I have shown and described a specific embodiment of a detachablecap, various modifications and changes in structure thereof are possiblewithin the spirit of the invention and the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent, is:

1. In a plane, in combination, a plane body provided with a cutter seat,a cutter positioned thereon, an abutment carried by said plane body, anda detachable cap for said cutter comprising a main body portion adaptedto be seated over said cutter and a palm rest connected to said mainbody portion and a relatively movable member carried by said bodyportion and adapted to be positioned to engage and clamp said cutter onits seat and to engage said abutment and lock said body portion againstmovement relative thereto and to said plane body.

2. In a plane, in combination, a plane body provided with a cutter seat,a cutter positioned thereon, an abutment carried by said body portion,and a detachable cap for said cutter comprising a base adapted to beseated over said cutter to engage said abutment and a palm restextending rearwardly of said base, and a clamping lever pivotallycarried by said cap and formed for simultaneous engagement with saidabutment and said cutter whereby said lever may be actuated to engageand clamp said cutter on its seat and also to simultaneously engage saidabutment and lock said body portion against movement relative to saidplane body.

3. In combination with a plane body prowardly projecting abutment, adetachable cutter cap comprising an integral body por tion embodying abase adapted to be seated over the plane cutter and to engage saidabutment and a portion extended rearwardly of said base to form a palmrest, and a lever pivoted adjacent one end to said rearwardly extendingportion and having said pivoted end provided with a cutter-clamping camand having its outer end formed with a locking shoulder adapted toengage said plane abutment when said lever is moved to cutter clampingposition, thereby locking said body portion against movement relative tosaid abutment and to said plane body.

JAMES M. BURDICK. Witnesses:

I. W. CHAPMAN, W. J. WORAM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

it. is hereby certified that in Letters Patent N o. 1,0i8,455, grantedDecember 24, 1912, upon the application of James M. Burdiek, of NewBritain, Connecticut, for an improvement in Planes, an error appears inthe printed specification requiring correction as follows: Page 2, line50, after the word cutter insert the Words to engage said abutment, andthat the said Letters Patent should he read with this correction thereinthat the same may conform to the record of the ease in the PatentOtfice.

Signed and sealed this 28th day of January, A. D., 1913.

[SEAL] (J. (J. BILLINGS,

Acting Cowwnissionvr of Patents.

